Oil burner



J. Ay GREEN Jan. 6. l 925.

ou. BURNER 2 Sheets-Sheen l Filed March 13, 1924 3mm/Hoz 1,521,681 J.A.GREEN OIL BURNER 2 Sheets-Sheet 2 Filed March 1,5, 1924 Jaw@ A @amPatented Jan. 6, 1925.

UNITED STATES JOHNSTON A. GREEN, 0F SIGOURNEY, IOWA.

OIL BURNER.

Application filed March 13, 1924. Serial No. 699,019.

To all whom, t may concern.'

Be it known that I, JOHNSTON A. GREEN, a citizen of the United States,residing at Sigourney. in the county of Keokuk and State of Iowa7 haveinvented certain new and useful Improvements in Oil Burners, of whichthe following is a specification.

This invention relates to oil burners and more particularly to such adevice especially adapted for use in furnaces of the hot air type.

An important object of the invention is the provision of a device of theabove mentioned character which is simple in construction and easilyassembled within the usual type of hot air furnace without materialalteration thereof.

A further object of the invention isto provide va simplified type ofburner construction having novel means for supplying primary andsecondary air to support combustion of the oil whereby completelcombustion is effected.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the drawings I have shown one embodiment of the invention. In thisshowing,

Figure 1 is a central vertical sectional view,

Figure 2 is a section on line 2-2 of Figure 1,

Figure 3 is a section on line 3-3 of Figure 1, and,

Figure 4 is a sectional perspective view of the secondary air tubesupporting member.

Referring to the drawing the numeral 10 designates the outer shell ordrum of an ordinary hot air furnace shown in the present instance as thepipeless type. A second drum 11 is arranged concentrically within andspaced from the drum 10 to provide the usual cold air spacey 12. Theupper ends of the drums 10 and 11 are adapted to support the usualregister 13. A third drum 14 is arranged concentrically within andspaced from the drum 11 to provide the usual hot air space 15 as willbeunderstood. The drum 14 terminates asubstantial distance below theupper ends of the drums 10 and 11 and is closed by aplate 16 as shown inFigure 1. The interior of the drum 14 forms the usual fire box and afire door 17 communicates with the fire box tlrrough a tube 1 8extending through the spaces 12 and 15. The drum'14 is providedinteriorly near its lower end with an internal annular flange 22 adaptedto support a disk 23 forming a substantial closure for the lower end ofthe driun 14. The space between the disk 23 and base 21 provides an airspace 24 from which air is drawn to support combustion as will bedescribed. Communication between the atmosphere and the space 24isaflorded through a tube 25 and passage of air into the space 24 may becontrolled by a door 26.

The numeral 27 designates a burner cup arranged within the fire box asclearly shown in Figure 1 and adapted to be supported upon the disk 23by lugs 28. The cup 27 is arranged concentrically within 'and spacedfrom the walls of the drum 14 and the space between the` cup 27 and drum14 is adapted to be filled with material 29, preferably asbestos. Thebottom 30 of the cup 27 is provided with a central apertured openingadapted to receive the threaded lower end of a primary air tube 3-1. Thetube 31 is provided adjacent its lower end with a thickened annularportion 32 provided with a plurality of oil supply openin s 33 threadedat their lower ends to receive the threaded upper ends of oil tubes 34.The oil tubes 34 are supplied with oil from a pige 35 controlled by avalve 36 shown in ig. 3. The sp-ace between the thickened lower end 32of the tube 31 and the side walls of the cup 27 is preferably filledwith absorbent material 37 which may be asbestos or any other desiredmaterial.

The disk 23 is centrally apertured as at 38 and a supporting member 39is arranged within this opening. As shown in Fi re. 4 the supportingmember 39 is provide at its upper end with an outstanding annular flange40 provided with openings 41 adapted to receive bolts (not shown) bymeans of'which the supporting member 39 43 apertured as at 44 for thepassage of air as will be described. The supporting member 39 isprovided centrally with an upwardly extending tubular portion 45 for a.purpose to be described. The flange 40 is alsoaperturedas at 46 and theoil pipes 34 extend through these vapertures for connection with theopenings 33.

Referring to Figures 1 and 3, the numeral 47 designates a supplementaryair tube, the lower end of which is arranged within the tubular portion45 of the supporting member 39. The tube 47 is provided near its lowerend withv an annular flange 48 adapted to rest upon the tubular por-tion45 to be supported thereby. As shown in Figure 1, the tube 47 isarranged concentrically within the tube 31 and spaced therefrom'toprovide an air passage 49. An air distributing member 50 is arranged onthe upper end of the tube. 47. The member 50 is hollow as shown inFigure 1 and communicates with the interior ofthe tube 47. The lowerwall 51 of the member 51is apertured as at 52 to permit egress of airfrom the interior of the member 50.

The operation of the device is as follows:

The pipe 35 is connected to a suitable source of fuel oil supply and thevalve 36 is opened to permit oil to flow Athrough the pipes 34 tosaturate the asbestos 37. The oil within the burner cup is ignitedthrough the door 17 and after the oil has been burning a short time thecup 27 and tube 31 are heated thus assisting in the vaporization of theoil. The draft created through the pipe 19 due to the combustion of theoil draws air upwardly through the openings 44 and 49 to supply primaryair to support combustion of the oil. At the same time secondary air issupplied through the openings 52 whereby complete c-ombustion iseifected. If the quantity of air supplied is excessive the draft may beregulated by the damper 20. The rate at which the oil burns andconsequently the intensity of the heat can be regulated by the valve 36to permit the oil to flow at a faster or slower rate into the asbestos37. When it'is desired to shut olf the burner it is merely necessary toclose the valve 36 and the oil held by the asbestos 37 will soon burnout and the flame be extinguished.

It will be apparent that the heating of the tire box in the manner justdescribed will heat the hot air space 15 causing the p air therein torise as will be obvious, the

distributor 50 acting as a spreader to direct the flame outwardlyagainst the wall 14 to assist lin highly heating the space 15. As theair in space 15 rises it will heapparent that the air within the space12will move downwardly and be fed into the space 15 to be heated by thedrum 14. Obviously the heated air in the space 15 will flow upwardlyinto the room above through the register 13. lVhile I have shown theburner as applied to a hot air furnace of the pipeless type it will beobvious that the invention is not limited to theI application shown butmay be applied with efficient results to any type of furnace.

It is to be understood that the form of my invention herewith shown anddescribed is to be taken as a preferred example of the same, and thatvarious changes in the shape, size, and arrangement of parts may beresorted to 'without departing from the spirit of the invention or thescope of the subjo-ined claims.

Having described my invention, I claim:

1. A device of the character described comprising a burner cup having anopen upper end, an air tube arranged concentrically withinsaid cup andaffording communication between the interior of "said cup .and the spacetherebelow, means for supplying fuel to said burner cup, and a secondaryair tube arranged concentrically within the irst named air tube andadapted to discharge air above the upper end thereof adjacent the upperend of said burner cup.

2. A device of the character described comprising a burner cup having anopen upper` end, an air tube arranged concentrically within said cup andaffording communication between the interior of said cup and the spacetherebelow, means for supplying fuel to said burner cup, a secondary airtube arranged concentrically within and spaced from the rst named airtube, and an air distributor arranged on the upper end of said air tube,said distributor being provided with a discharge opening arrangedadjacent the upper end of said burner cup.

3. A device of the` character described comprising a burner cup providedin its bottom with a central opening, an.air tube arranged in saidburner cup over the opening therein, means for supplying fuel to saidburner cup, a secondary air tube arranged concentrically within andspaced from said first named air tube, and a hollow circular airdistributor arranged on the 'upper end of and communicating with saidsecondary air tube above the upper end of said iirst named air tube,said distributor being provided in its lower wall with a plurality ofopenings.

4. A device of the character described comprising a burner cup providedin its bottom with an axial opening, a primary air tube arrangedconcentrically within said burner cup over the opening therein, a bodyof absorbent material arranged in the bottom of said burner cup betweenthe walls thereof and said air tube,'said tube being provided with athickened portion having an oil passage therein communicating at itsupper end with the interior of said burner cup below the level of theabsorbent matevrial therein, an oil supply pipe connectedl y with thelower end of said passage, a secondary air tube arranged concentricallywithin and spaced from said primary air tube, and a hollow circular airdistributor a1'- ranged on the upper end of said secondary air tube asubstantial distance above the upper end of said primary air tube, thelower wall of said distributor being provided with a plurality ofopenings. i

5. A device constructed in accordance with claim 4 wherein saidsecondary 'air tube is provided adjacent its lower vend with an annularflange, and an apertured supporting member arranged below said primaryair tube, said supporting member being provided with a central tubularportion adapted to receive the lower end of said secondary air tube,said flange being adapted to rest on the ripper end of said tubularportion.

6. A device of the character described comprising a burner cup providedin its bottom with an axial opening, a primary air tube arranged,concentrically within said of absorbent material arranged in the bottomof said burner cup between the walls thereof and said air tube, saidtube being provided with a thickened bottom portion having an oilpassage therein commiinicating at its ripper end with the interior ofsaid burner cup below the level of the absorbent material therein, anoil supply pipe communicating with the lower end of said passage, arelatively flat hollow air distributing member arranged a substantialdistance above the upper end of said primary air tube, the

lower wall of said distributing member be-V ing provided with aplurality of openings, and means for supplying secondary air to theinterior of said distributing member.

' In testimony whereof I affix my signature in presence of twoWitnesses.

JGHNSTON A. GREEN.

